Morphology and interdiffusion control to improve adhesion and cohesion properties in inverted polymer solar cells

被引：20

作者：

Dupont, Stephanie R. ^{[1
]}

Voroshazi, Eszter ^{[2
]}

Nordlund, Dennis ^{[3
]}

Dauskardt, Reinhold H. ^{[1
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] IMEC VZW, B-3000 Louvain, Belgium

[3] SLAC, Synchrotron Radiat Lightsource, Menlo Pk, CA USA

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2015年 / 132卷

关键词：

Adhesion and delamination; Cohesion; Reliability; Polymer solar cells; Annealing; NEXAFS; X-RAY;

D O I：

10.1016/j.solmat.2014.09.013

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The role of pre-electrode deposition annealing on the morphology and the fracture properties of polymer solar cells is discussed. We found an increase in adhesion at the weak P3HT:PCBM/PEDOT:PSS interface with annealing temperature, caused by increased interdiffusion between the organic layers. The formation of micrometer sized PCBM crystallites, which occurs with annealing above the crystallization temperature of PCBM, initially weakened the P3HT:PCBM layer itself. Further annealing improved the cohesion, due to a pull-out toughening mechanism of the growing PCBM clusters. Understanding how the morphology, tuned by annealing, affects the adhesive and cohesive properties in these organic films is essential for the mechanical integrity of OPV devices. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：443 / 449

页数：7

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